{"id":3149,"date":"2018-01-28T20:19:51","date_gmt":"2018-01-28T20:19:51","guid":{"rendered":"http:\/\/avastar.online\/?page_id=3149"},"modified":"2018-01-28T20:19:51","modified_gmt":"2018-01-28T20:19:51","slug":"the-avastar-hand-rig","status":"publish","type":"page","link":"https:\/\/avalab.org\/avastar\/293\/reference\/usermanual\/advanced\/the-avastar-hand-rig\/","title":{"rendered":"Hand Rig"},"content":{"rendered":"

<\/image> Posing and Animating the Hands<\/h2>\n
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You have 2 possible options to pose and animate the Hands. You can use the FK Constrained Rig<\/span><\/em>(default) or you can use the FK Simple Rig<\/span><\/em>.<\/p>\n

Both Rigs have very different advantages:<\/p>\n

With the FK Constrained rig you can setup realistic hand poses in a very short time with just a few clicks. But you can not create every possible pose.<\/p>\n

With the FK Simple rig you can pose each finger bone individually with no restriction, but you also can mess up the pose easily.<\/p>\n<\/div>\n

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FK Constrained Rig<\/h3>\n
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With the FK Constrained Rig you typically select only the first bones of the fingers (in red) and rotate those bones along the local X axis (by typing ‘R’ for rotate followed by 2 ‘x’ for local x axis)<\/p>\n

All other finger bones will automatically curl up following the rotations of the first finger bones. The rig is constructed so that when you select all first fingers (and first thumb bones) then R xx will open and close the hand in a reasonable way.<\/p>\n<\/div>\n

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Of course you can rotate each finger to a different angle to place the hands into a variety of poses. You also can select the second and third fingers and rotate them as well, either all together or one by one. The FK Rig tries to keep the hand pose always realistic.<\/p>\n

FK Simple Rig<\/h3>\n
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If you want to create very detailed and special poses then you can use the FK Simple Rig. Here you will pose each finger bone individually.<\/p>\n

this mode allows you to place each bone of each finger in exactly the way you want.<\/p>\n<\/div>\n

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Never mix FK Constrained and FK Simple<\/h3>\n
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When you rotate the fingers individually and then switch from FK Simple<\/span><\/em> to FK Constrained<\/span><\/em> then the constraints will result in additional rotations.<\/p>\n

In the image aside i tried to visualize what happens. Here the finger bones get rotated much more than anticipated as soon as you switch to FK Constrained<\/span><\/em>.<\/p>\n<\/div>\n

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Caveat:<\/strong><\/span> Sometimes you do not see that your finger rotations actually are getting too large until you\u00a0 store the blend file and reload it. The reason for this is that the auto FK is not always applied immediately on top of the already existing rotations when you switch the mode. Because of this we strongly recommend that you either use the FK Constrained mode or the FK Simple mode and never mix both modes.<\/p>\n

Adjusting the Hand Rig to Custom meshes<\/h2>\n

In this chapter we will focus on custom hands. I am using a slightly modified version of the avamesh model here. If you want to follow this document, then you can prepare your scene as follows:<\/p>\n

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